Shedding light on dark DNA Most textbook definitions of evolution state that it occurs in two stages: mutation followed by natural selection. DNA mutation is a common and continuous process, and occurs completely at random.
The average adult only eats 15 grams of fiber per day. Women need 25 grams of fiber per day, and men need 38 grams per day, according to the Institute of Medicine.
How much fiber should be consumed daily? The recommended fiber intake for people 50 and older is 21 grams per day for women and. 30 grams per day for men.3. 2. What are the dangers associated with a low-fiber diet? Constipation and Diverticulosis.